On November 9, 2021, Microsoft released the cumulative update KB5007205 for Windows Server 2022. This is an important security update that also brings some quality improvements. The update log points out that it solves a problem that some applications may have unexpected results when rendering some user interface elements or drawing within the application. This problem may be encountered in applications that use GDI+ and set a zero (0) width pen object on a display with a higher resolution (DPI), or when the application uses the zoom function.
But this is not the point. Unfortunately for administrators, while fixing this issue that is not important to most people, this update is accompanied by some known issues, one of which is also related to security. Microsoft pointed out that after installing KB5007205, administrators may find that Microsoft Defender for Endpoint may not be able to start or run on devices with Windows Server Core installed.
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Microsoft Defender for Endpoint is an enterprise endpoint security platform designed to help enterprise networks prevent, detect, investigate and respond to advanced threats. Fortunately, the desktop client, Microsoft Defender for Endpoint on the consumer version of Windows 10, is not affected.
Microsoft said that they are working on a solution and will provide an update in the upcoming version. If you are in an enterprise or server environment, please follow the support page of KB5007205 for the latest situation: